Adolpii schmidt



No. 616,637. Patented Dec. 27, I898. A. SCHMIDT. APPARATUS FOREXTRAGTING GASEOUS- PRODUCTS FROM DRY DISTl-LLATION 0F WOOD.

(Application filed May 2, 1896.)

(No Model.)

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ADOLPII SCHMIDT, OF CASSEL, GERMANY.

APPARATUS FOR EXTRACTlNG GASEOUS PRODUCTS FROM DRY DISTILLATION 0F WOOD.

SPECIFICATION forming part of Letters Patent N 0. 616,637, datedDecember 27, 1898.

Application filed May 2,1896.

To all whom it may concern:

Be it known that I,ADOLPH SCHMIDT, a subject of the King of Prussia,German Emperor, and a resident of Cassel, in the Kingdom of Prussia,German Empire, have invented certain new and useful Improvements inApparatus for Extracting Gaseous Products from the Dry Distillation offood, of which the following is a full, clear, and exact description.

The invention has been patented in Germany, No. 89,120, dated January27, 1896; in Austria, No. 46/798, dated February 5, 1896; in Hungary,No. 6,936, dated February 7, 1896; in Luxemburg, No. 2,457, datedFebruary 26, 1896; in Switzerland, provisional patent, No. 12,086, datedApril 27, 1896; in France, No. 254,23., dated February 26, 1896; inBelgium, No. 120,051, dated February 26, 1896; in Great Britain, No.4,598, dated February 29, 1896; in Denmark, No. 845, dated March 2,1896; in Sweden, No. 7,640, dated March 3, 1896; in Norway, No. 4,818,dated March 2, 1896; in Italy, No. Ell/41,218, dated April 2, 1896; inSpain, No. 18,634, dated February 6, 1896; in Portugal, No. 2,194, datedApril 1, 1896; in Finland, No. 630, dated April 30, 1896; in Canada, No.54,134, dated May 13, 1896; in Turkey, No. 498,dated March 30, 1896; inTunis, No. 175, dated March 25, 1896; in Cape Colony, No. 6/419, datedMay 22, 1896; in Natal, No. 45/1,896, dated May 18, 1896; in Congo FreeState, No. 34, dated October 5, 1896; in Ceylon, No. 542, dated December23, 1896; in India, No. 3,031, dated OctoberS, 1896; in New South ales,No. 6,596, dated May 28, 1896; in New Zealand, 'Xo. 8,549, dated June 3,1896; in Tasmania, bio-1,638, dated June 18, 1896; in lVest Australia,No. 908, dated May 29, 1896; in Victoria, No. 13,131, dated May 26,1896; in Queensland, No. 3,400, dated June 16, 1896; in South Australia,No. 3,259, dated May 26, 1896; in Argentine Republic, No. 1,820,datedJune 5, 1896; in Brazil, No. 2,050, dated May 25, 1896; in Peru,No. 15, dated September 14, 1896; in Uruguay, No. 135, dated June 16,1896; in Colombia, No. 720, dated June 9, 1896, and in Mexico, No. 946,dated July 22, 1896.

My invention includes the combination of Serial No. 590,028. (No model.)

1 parts hereinafter described, and particularly pointed out in theclaims.

In order to render the present specification more easily intelligible,reference is had to the accompanying drawings, in which similar lettersdenote similar parts throughout both views.

Figure 1 is a diagrammatical representation of a distillery, and Fig. 2a detail View of the present improvement.

In connection with the processes hitherto known for distilling woodthere is considerable danger of decomposing the products ofdistillation, particularly acetic acid, wood spirit, and tar, While theyare exposed to the high temperature of the retorts. This danger isenhanced and the output correspondingly decreased the longer theproducts of distillation are allowed to remain in the re-- tort aftertheir formation. This circumstance is explained by the fact that theresults of distillation are considerably better when the process iscarried out by means of small retorts, in which case the products ofdistillation have only a short distance to go in order to pass out ofthe retorts. The employment of small retorts is, however, notsufficiently economical in connection with big works. According to thepresent invention-the exit of the products of distillation from theretorts is accelerated and a more advantageous output attained.

The invention consists in means for introducing into the outlet-pipe ofthe distillingretort at a suitable pointin the same a current or jet ofwarm air. This jet serves a double purpose. In the first place it servesto draw out the gases developed in the retorts by means of suction, thusaccelerating their exit,

from the retort and preventing the decomposition of the products ofdistillation formed,

and in the second place the oxygen contained in the air introduced hasan oxidizing effect on the gases. Since aldehyde is always formed in thedry distillation of wood and this substance, as is known, easilyoxidizes to acetic acid, the introduction of the air-jet simultaneouslyeffects an increased production of acetic acid in consequence of theoxidation of the products of distillation.

In the drawings, A is the distilling-retort;

I, the outlet for the gaseous products; B, the condenser; s, a pipe forconducting the noncondensable gases to the furnace. In Fig. 2 I is theinjector-nozzle, by means of which the air is blown into the outlet-pipeL after having been pumped through the heating apparatus E by theair-pump D. It is necessary that the air introduced into the outletpipeshould be previously heated. Otherwise it will tend to condense theproducts already in the outlet-pipe and block up the same.

The non-condensable gases are conducted to the furnace in the well-knownmanner and there used as fuel. The temperature of the injected air mustbe about 80 or 100 centigracle.

It may be said that the air is blown in1 e. the injector is set toaction as soon as the gases begin to generate. To stipulate a definitetime for this is an impossibility, because that depends upon the natureof the wood to be distilled and upon the firing, the construction andsize of the retorts, 850. Moreover,

the injection might be made in such a manner that a weak air-blast isinjected at the beginning of the retort firing, and the strength andvolume will be increased as the temperature rises in the retort and asthe gases accordingly generate in proportion. As to the length of timeemployed in the injection of the air it is manifest that such injectionshould only take place while the gases generate i. 6., while there isdistillation going on. At the moment when the distillation isinterrupted L'. 6., when coking has been achieved-the injector will bestopped.

I claim as my invention- 1. In combination, the kiln, its dischargepipe'for gases, an air-forcing fan, a heater between the same and the-kiln, apipe for 40 leading the hot air through said heater to thedischarge-pipe, said air-pipe having an airinjector in thedischarge-pipe, substantially as described.

2. In combination with the discharge-pipe of a distilling-kiln, aninjector in said pipe and ahot-airpipe leading to the injector, withmeans for heating the air in said pipe sub stantially as described.

In witness whereof I have hereunto set my hand in presence of twowitnesses.

AD OLPI'I SCHMIDT.

Vitnesses:

FRIEDRICH ROSENTHAL, IIERMANN KERSTING.

